The urban extended district includes the new district and urban fringe district;it is the expanding of urban space, stands for the urban new power. The urbanization changes the land function and the water environment, and the water environment improving plays the important role to the urban quality. Water environment planning connects with the banks land planning, water conservancy project, water pol ution regulation, stagnant water drainage planning and trafifc planning, is a comprehensive planning. Baitabao river planning fol ows the principle of“smal project, big result”, takes the thoughts of prevent or control lfood, obligate the outlet, water-land sharing, removing and improving, comes true water-city development.